Do you think 6 years is too big of a age gap?

For me i think it's better if the woman is a bit younger. No more than four years. I am currently in a relationship with someone seven years older and we are both over 55. I am an old soul. Always have been as my parents were in their fourties when I was born. She retiring and I am still working. When she went through menopause all interest in sex disappeared. She will not take hormones. Her interests in music are quite different and she is a vegetarian. We are comfortable together, we do not fight, but I think things would have been a bit more stimulating with someone younger or at least with a few more things in common.